The visitors felt greatly surprised at________they saw in th

The visitors felt greatly surprised at________they saw in the museum.A.who B.who

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If it________tomorrow, the basketball match has to be cancel

If it________tomorrow, the basketball match has to be canceled.A.rain B.Rains C.

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In Britain, the best season of the year is probably________s

In Britain, the best season of the year is probably________spring.A.Later B.latt

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易燃易爆危险品是指容易燃烧爆炸的危险品,其不包括(  )。

易燃易爆危险品是指容易燃烧爆炸的危险品,其不包括(  )。A.易于自燃的物质 B.腐蚀品 C.氧化性物质 D.有机过氧化物

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按物质产生爆炸的原因和性质不同,通常可将爆炸分为(  )等几种。

按物质产生爆炸的原因和性质不同,通常可将爆炸分为(  )等几种。A.物理爆炸 B.粉尘爆炸 C.化学爆炸 D.炸药爆炸 E.核爆炸

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